哪里错了吗
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>多物体运动</title>
<style>
ul,li{
list-style:none;
}
ul li{
width:200px;
height:100px;
background:yellow;
margin-bottom:20px;
}
</style>
<script>
window.onload=function(){
var aLi=document.getElementsByName('li');
for(var i=0;i<aLi.length;i++){
aLi[i].onmouseover=function(){
startMove(this,400);
}
aLi[i].onmouseout=function(){
startMove(this,200);
}
}
}
var timer=null;
function startMove(obj,iTarget){
clearInterval(timer);//关闭定时器
timer=setInterval(function(){//开启定时器.下面在定义速速
var speed=(iTarget-obj.offsetWidth)/8;
speed=speed>0?Math.ceil(speed):Math.floor(speed);
if(obj.offsetWidth==iTarget){//如果当时宽度等于目标
clearInterval(timer);
}
else{
obj.syle.width=obj.offsetWidth+speed+'px';
}
},30)
}
</script>
</head>
<body>
<ul>
<li></li>
<li></li>
<li></li>
</ul>
</body>
</html>
